Windows 10: Unable to create a simple Volume out of unallocated space.

Unable to create a simple Volume out of unallocated space.

Alright, so I want to dual boot Ubuntu along side Windows 10. I shrunk my C drive to make a new partition for Ubuntu around 40 GB. However after shrinking the partition, when I try to create a simple volume out of the unallocated space, I get a warning that it will be converted to a dynamic disk and that I will no longer be able to load installed Operating Systems on my Hard Drive. Now, I know that I cannot have more than 4 partitions. The partions on my HDD are:
1. System Partition 100 MB NTFS
2. C dive 296 GB where Windows is.
3. Healthy Recovery 450 MB ( This doesn't show up in This PC)
4. D drive 634 GB. Where I store my data.
Is there any way to create another partition without converting my drive to a dynamic one?

P.S. I am not sure if this is the right category to place this question, but I didn't know where else I could post this.

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You could convert an existing partition to a logicial / extended partition..

Wouldn't converting to GPT have the side effect of erasing the entire HDD? My Bios does have UEFI support but Windows 10 is installed on legacy boot.
How do I convert an existing partition to a logical/extended one as you said, if my drive already has 4 partitions?

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I know there are supposed to be ways to convert a disk to GPT without losing the data, but I, personally, have never gotten that to work with a system boot disk. Others have said they have done it.

You can use MiniTool Partition Wizard Free to convert the primary partition next to the unallocated space to a logical partition and then add the unallocated space as a second logical partition. All logical partitions must be located next to each other. Any partition can be logical except for the system reserved partition the computer boots from - that must stay as a primary partition.

Even better is to make an image of the existing hard drive - if you have an external storage location to hold it, so that you can easily restore if something goes wrong. Macrium Reflect Free, also on Kyhi's recovery drive, is very good for that:Macrium Reflect Free

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Okay, Just installed Easus Partition Master Trial version. So is this what I should do?
1. Shrink either C or D according to required size, leaving System Recovery and Healthy Recovery partitions alone.
2. Convert either C or D to logical partition.
3. Add the unallocated space as a second logical partition to the newly created logical partition.
4. Now Run the Ubuntu installer, and this second logical partition will show up?

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Steps 1 through 3 are yes. I haven't installed Ubuntu as a dual boot, but step 4 sounds correct. How permanent are you planning on Ubuntu being? Another option would be to install it inside a VM in Windows, that way it won't mess with your hard drive boot sector/files if you want to remove it later.

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